Spool bobbin



L. DA c. GdMEZ SPooL BoBBIN Fi1ed sept. 12, 1940 Pafenfed sopf. 2, 1941 UNITED STATES PATENT oFFCE 1 clarifl.

T21is invention feates to neW and usefu1 i1f proveInents in o cellu1oid of the like spoo1 bob bin fof se ing fngohines.

Sti11 fufthef the invention proposes the oon struotion of o. spool bobbin fo1' seWing nfachines ohofaotefized by o one-pieoe body hoving o ho1- loW oylifldricol shook With flonges on the ends thereof fo peffnit thfead to be Woond thefeon in the conventiona nlonnef.

g. 7 is a veW Sifnilaif to g. 3 bnt nlustfatihg a sti1 fufthef ff1odiffoatiof1 of the invention.

The cellulofd of the like spoo1 bobbi11 fof Sevv ing n1achines accofoing to this fnvention in oludes a one-pfeoe plostio body l0 hoving o ho1 1ow oylindfioa1 Shank poftion 0 ond al paif of ef1d nanges lo The end onges lo oTe in tegfo1y forIned upon the ends of the shank l The onepieoe body ID`iS pfefefobly fofIneo of celluloid of othef oheop oon1position plastio ma tefials so that o workmon fnay be suppned With a number of these bobbins hovg the thfead olready Wound thefeon fof elin1inating the bothefSome necessi of fewinding the bobbin eaoh tiIne the thfead is oon1pletely unwound thereffofn. If bobbins of this oonstfootion afe used, they may be thfoWn owoy When the threadS Ineans fof, holding the-sanle in position upon the shonk of the bobbin fo1 oousif1g the f1ange to dfop off When the bobbin is oompletely emptied of the thfeod Wound thefeon in o Iflonnef to pfevent the bobbin ffoIn being fevvound,. ex cept vvith the usevof specfa1 equipfffent.

sti11 forthef it is pfoposed to oonstruct aj bob bin With 8 poir of femovable end ffanges mount ed 11pof1 o shonk portion in o nlonneT to prevent the spool ffom being feWound.

ff fufthef objeot of tffis invention is to constfuot al celluloid spoo1 bobbin Which iS Fifnple and oo able ond Which Inay be Inanufoofofeo and sold ot o feasonabe cost.

Fof fufthef cofopfehension of the fnvention, and of the objects ond advantages thefeof, refefenoe vvi11 be had to the folloWing desofipfion spoo1 bobbin constfuoted in oooofdonce With o n1odiffootion of this invontlon.

:E,ig. 1s a sectiona1 vieW on the hne of I ,ig. 5 is al sectiona1 vieW on the nne 55 of taken on the 1ine of of 3.

A fiange 2 is positioneo odiacent the othef end of the oylindficol Shonk 2 and a n eanS is coopofative With the thfeod Wound upon the spool for holding the Ten1ovable fiange 2| in position upon the end of the shank 2n The fen1ovable nange 2l is also fo ofed of a plastic fnotefioL The nloons fo1 holding the fen1ovable oange 2 comprise a pluTolity of spoced in vvofdly extending lug nlen1befs 22 vvhich have one of theif enos dffectly n1olded into the fen1ovoble nange 2l Shown in fg. 6. The lugs 22 extend inWafds and engage into complen1entory fecesses 23 fofmed in the faoe. of the shank 20 The gfooves 23 extend invvofds ffofn the end of the Shank 20 ond ofe of a depth to oocoIn In odote the thickness of thoJugs f2 so as to oouSe the exposed faoe of the lugs 22 t() be flushed With the outside faloe of tffe shonk 20 (see 1 ig, 6) T'he 111gS 22 have theiT innof endS bent out Words as indicated by the fefefenoe nuInefa1 22 So as to be oought betveen the adjaoent cons of the thfeads 2f wound opon the shonk 20 fof pfeventing the ffange 2 ffon1 being fefnoved fTom the shank 20 Whne thfeods sti11 femain ound thereon. IIo ever When the thfead 20 js completely unWound fToln the Shonk 2o the constfuction pefn1its the fenlovoble fiango 2l to dfop off the shonk 20! in o monnef to prevent the thfeod ffofn ogain being fevvound upon the bobb. 

